Plant vigor
| Code | Term | Description |
|---|---|---|
| 1 | Non vigorous (height less than 37 cm and width less than 75 cm) | |
| 2 | Intermediate (height more than 37 cm or width more than 75 cm) | |
| 3 | Vigorous (height more than 37 cm and width more than 75 cm) | |
| 4 | Very vigorous (height more than 50 cm and width more than 100 cm) |